Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12d5d1ba7cecc97…

MALICIOUS

PDF

81.9 KB Created: 2021-09-19 10:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5268feb2f60ba9d1133925d490685ff9 SHA-1: b193a8cc2808fd77841b95e3649eadb2a8806fe4 SHA-256: e12d5d1ba7cecc972d70f16a574889b24845951c558881ad36ba465094509a56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of embedded JavaScript and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely for phishing or distributing further malware. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://omegaplus.bg/uploads/pages/files/wuvuvoromolovirax.pdf In PDF document text
    • https://kibledergisi.net/resimler/files/9119208251.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/suzufixanaperegekakixa.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/kojojawewunisuzaregadofo.pdfIn PDF document text
    • http://newkontakt.ru/userfiles/images/file/fulosujumawewobu.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/rogotozonenunikonag.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/5cadd0c939036e6501c6eac3d57d117a/sibotugojovogafudulo.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/tifatu.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/sezosedovexezedute.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef738325f9---fesenaledinisudusikepofe.pdfIn PDF document text
    • http://wohntraumgmbh.at/revitopasewumol.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/47113781371.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d75132c040---65809070918.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/780c86f4130f7250fb0d8cae77f5e7ea/komejoxokoxufu.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/41218887368.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/busubujuzosevetitusomevig.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/nosezesivotewin.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/gimoxonudoxumemoxerifuzu.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/8493190087.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/dugulivomafebojetujitije.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130527fab884---zopofo.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/6ifh3va3mfr8oabqsse2kidr45/10676440969.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/malomululegetolevo.pdfIn PDF document text
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/76125102807.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/winuxiwewajubixituvowilem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=virtual+escape+room+harry+potterPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB45 17832 bytes
SHA-256: 96164599028d9f146ee7e7469a7ffa1b601f2d914da70c67558e5b17f40c0a04
font_01_sfnt_off00010947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10947 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001215e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215E 10716 bytes
SHA-256: cd53f382d48e7fa2d37f7be2ad54ebba604c8ee9a6a4880112159586cd4606ed

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